During prednisolone taper, patients should be evaluated for toxicity and relapse with periodic clinical evaluation supported by inflammatory markers. Relapses should be diagnosed objectively as at diagnosis. Isolated elevation of inflammatory markers in the absence of clinical symptoms should not automatically result in escalation of therapy. Imaging is not routinely recommended for follow-up in patients in clinical and biochemical remission.[38]Dejaco C, Ramiro S, Bond M, et al. EULAR recommendations for the use of imaging in large vessel vasculitis in clinical practice: 2023 update. Ann Rheum Dis. 2024 May 15;83(6):741-51.
https://www.doi.org/10.1136/ard-2023-224543
http://www.ncbi.nlm.nih.gov/pubmed/37550004?tool=bestpractice.com
Ultrasound, fluorodeoxyglucose-positron emission tomography, or magnetic resonance imaging may be used for assessing vessel abnormalities in patients with large vessel vasculitis with suspected relapse, particularly when laboratory markers of inflammation are unreliable.[38]Dejaco C, Ramiro S, Bond M, et al. EULAR recommendations for the use of imaging in large vessel vasculitis in clinical practice: 2023 update. Ann Rheum Dis. 2024 May 15;83(6):741-51.
https://www.doi.org/10.1136/ard-2023-224543
http://www.ncbi.nlm.nih.gov/pubmed/37550004?tool=bestpractice.com
Magnetic resonance angiography, computed tomography angiography, or ultrasound may be used for long-term monitoring of structural damage, particularly at sites of preceding vascular inflammation.[38]Dejaco C, Ramiro S, Bond M, et al. EULAR recommendations for the use of imaging in large vessel vasculitis in clinical practice: 2023 update. Ann Rheum Dis. 2024 May 15;83(6):741-51.
https://www.doi.org/10.1136/ard-2023-224543
http://www.ncbi.nlm.nih.gov/pubmed/37550004?tool=bestpractice.com
However, ultrasonography in follow-up is not yet adequately defined. Some patients have persistent changes in the larger arteries but these do not necessarily imply treatment failure or predict relapses.[105]Coath FL, Mukhtyar C. Ultrasonography in the diagnosis and follow-up of giant cell arteritis. Rheumatology (Oxford). 2021 Jun 18;60(6):2528-36.
https://www.doi.org/10.1093/rheumatology/keab179
http://www.ncbi.nlm.nih.gov/pubmed/33599253?tool=bestpractice.com
The frequency of screening as well as the imaging method applied should be decided on an individual basis.[38]Dejaco C, Ramiro S, Bond M, et al. EULAR recommendations for the use of imaging in large vessel vasculitis in clinical practice: 2023 update. Ann Rheum Dis. 2024 May 15;83(6):741-51.
https://www.doi.org/10.1136/ard-2023-224543
http://www.ncbi.nlm.nih.gov/pubmed/37550004?tool=bestpractice.com
Patients on long-term glucocorticoids can develop glucocorticoid-induced adverse effects.[37]Coath FL, Bukhari M, Ducker G, et al. Quality standards for the care of people with giant cell arteritis in secondary care. Rheumatology (Oxford). 2023 Sep 1;62(9):3075-83.
http://www.ncbi.nlm.nih.gov/pubmed/36692142?tool=bestpractice.com
Patients should be monitored for diabetes, elevated blood pressure, and glucocorticoid-induced bone loss.[66]Strehl C, Bijlsma JW, de Wit M, et al. Defining conditions where long-term glucocorticoid treatment has an acceptably low level of harm to facilitate implementation of existing recommendations: viewpoints from an EULAR task force. Ann Rheum Dis. 2016 Jun;75(6):952-7.
http://www.ncbi.nlm.nih.gov/pubmed/26933146?tool=bestpractice.com
[67]Wilson JC, Sarsour K, Collinson N, et al. Serious adverse effects associated with glucocorticoid therapy in patients with giant cell arteritis (GCA): a nested case-control analysis. Semin Arthritis Rheum. 2017 Jun;46(6):819-27.
http://www.ncbi.nlm.nih.gov/pubmed/28040244?tool=bestpractice.com
[68]Yu E, Chang JR. Giant cell arteritis: updates and controversies. Front Ophthalmol (Lausanne). 2022 Mar 17:2:848861.
https://www.doi.org/10.3389/fopht.2022.848861
http://www.ncbi.nlm.nih.gov/pubmed/38983551?tool=bestpractice.com
Patients sometimes have a normochromic, normocytic anaemia with a normal white blood cell count and elevated platelet count. Full blood count should be monitored.